Diff: Frame.h

Revision:

0:57f4fdadc97f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Frame.h	Fri Nov 20 14:40:48 2009 +0000
@@ -0,0 +1,49 @@
+
+// We're on an LPC2368:
+// http://www.standardics.nxp.com/support/documents/microcontrollers/pdf/user.manual.lpc23xx.pdf
+// so we have 32k of RAM available
+// The faster MBEDs use the 1768, with 64k of RAM
+
+// Assume we will work at 80x60, 1 byte per pixel, hence 5k/frame
+
+// This class keeps an array of reusable frames - 
+//   Get one with a call of Frame::allocFrame, 
+//   Give it back with Frame::releaseFrame
+
+#define MAX_FRAMES 10
+
+class Frame
+{
+private:
+	Frame();
+	~Frame();
+	void init( uint8_t pixelFormat, uint16_t width, uint16_t height, uint32_t frameSize );
+
+public:
+	uint16_t getPixel( uint32_t p );
+	void setPixel( uint32_t p, uint16_t  );
+	void writeToFile( char *filename );
+	static void readFromFile( char *filename, Frame **frame );
+
+
+	// Use these methods to manage a pool of frames to avoid fragmentation
+	static void initFrames();
+	static void allocFrame( Frame **frame, uint8_t pixelFormat, uint16_t width, uint16_t height, uint16_t frameSize );
+	static void releaseFrame( Frame **frame );
+	static void cloneFrame( Frame **clone, Frame* original );
+	
+private:
+	static Frame* m_frames[MAX_FRAMES];
+
+public:
+	uint8_t *m_pixels;
+	uint16_t m_width;
+	uint16_t m_height;
+	uint8_t m_pixelFormat;
+	uint32_t m_frameSize;
+	uint8_t m_bitsPerPixel;
+	uint32_t m_numPixels;
+	bool m_deleted;
+	bool m_bad;
+
+};
\ No newline at end of file